[Xenforox]

PHP Code:

//Under the CMD
ShowPlayerDialog(playerid,1, DIALOG_STYLE_INPUT, "Advertisment", "Please enter your Advertisment:", "Enter", "Cancel");
//Under OnDialog Responce
public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    if(dialogid == 1)
    {
             new string[256];
             format(string, sizeof(string),"[ADVERTISMENT]:%s", inputtext);
             SendClientMessageToAll(0x00F250FF, string);
    }
    return 1;
}